KYMCO AHG5, Service Manual

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13. Fi DIAGNOSTIC TOOL
DT X360
11
D. Troubleshooting
1 Troubleshooting Timing:
The CELP is flashing when turn on the ignition switch or during riding the vehicle, which
indicates that the EMS of the vehicle has failed.
2 Inspection Procedure:
2.1 To connect the diagnostic tool to the Fi system vehicle, the ignition switch should be
turn on but do not start the engine, then connect the communication cable to the
diagnostic connector in the vehicle. Use the diagnostic tool to read past error codes
2.2 If there is no error code, follow the
“Step 2.4”.
2.3
If there are error codes, follow the “D. Troubleshooting” using the diagnostic tool for
proper troubleshooting.
2.4 If the vehicle still fails after the error code is solved, follow the troubleshooting table to
check the symptoms of the fault and solve it.
2.5 After completing the troubleshooting, connect the diagnostic tool again to check for any
error codes.
E. Inspection, Repair and Assembly:
Inspection Points of Circuit (Prepare wiring diagram):
Poor Connection, Short Circuit, Open Circuit, High Resistance in Circuit and Too much Voltage
Drop (poor connection or oxidation terminals)
。
1 Poor Connection: Check the connection between the harness wires and battery terminals,
fuse installation, connection of each connector of Fi electronic components and sensors.
2 Short Circuit: The each pin in a connector of Fi electronic components or sensors should not
be in short circuit. Set the multimeter at continuity mode to test.
3 Open Circuit: There should be continuity between each pin in a connector of Fi electronic
components or sensors and power supply, ground wire, ECU PIN. Set the multimeter at
Ω
mode to test. If the result is above 40M
Ω
, this indicates an open circuit.
4 High Resistance in Circuit: The resistance should not be too high between each pin in a
connector of Fi electronic components or sensors and power supply, ground wire, ECU PIN.
Se
t the multimeter at Ω mode to test. The resistance value at both ends is subtracted from
the internal resistance of the test leads. The resistance is still above 3
Ω
indicating a
malfunction.
5 Too much Voltage Drop: Set the multimeter at V mode to measure the voltage from each
power supply pin of Fi electronic components and sensors to ground wire, and then measure
the battery voltage. If the voltage of the components to ground wire is 0.2 V DC lower than
battery voltage, this is an abnormal voltage drop.